(a) Commissioner shall mean the Commissioner of Transportation.

(b) Department shall mean the Department of Transportation.

(c) Freeway shall mean a divided controlled access highway having grade separated interchange connections with intersecting roads.

(d) Highway work area shall mean that portion of the highway being constructed, reconstructed, maintained or improved by the department, its employees, agents, or as contracted to contractors. It is that part of a highway being used or occupied for the conduct of highway work, within which workers, vehicles, equipment, materials, supplies, excavations or other obstructions are present.

(e) Major active work zone shall mean that part of a freeway having a normal speed limit of 55 miles per hour or greater where workers are engaged in a stationary operation that exceeds four hours in duration and are not predominantly separated from traffic by a temporary concrete or other rigid barrier system.

(f) Normal speed limit shall mean that speed limit had there been no highway work performed.

(g) Police presence shall mean police personnel assigned to a major active work zone or automated speed photo-enforcement systems and other similar devices.

(h) Radar speed display sign shall mean any device capable of measuring vehicle speeds and that clearly displays such speed to approaching vehicles.

(i) Stationary operation shall mean work in a specific location that does not move intermittently or continuously.

(j) Temporary speed limit shall mean the speed limit posted in the highway work area which reduces the normal speed limit on that highway; provided, however, that such a temporary speed limit shall not be less than 25 miles per hour.